8l: fix ldpe sym name length == 8 strdup incorrect.
8l: fix ldpe sym name length == 8 strdup incorrect.

R=rsc
CC=golang-dev
http://codereview.appspot.com/4102043

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go